Product Manual AGR-3
AGR 070A through 100A
21
300 (91)
47.6
44.0
Figure 7, Sound Pressure Attenuation Due to Distance from Unit
Unit Orientation to Minimize Sound
The AGR reciprocating chiller’s sound is directional in nature allowing the contractor/engineer to
position the unit to minimize potential noise problems. Because the sound pressure levels are lower at
both ends of the unit than at the sides, the chiller should be oriented such that the control box end or end
opposite the control box faces the direction where the lowest sound level is required.
The control box end provides an excellent acoustic barrier to the compressor sound as it covers one full
end of the unit. The sound pressure levels at the control box end will be 4 dBA less than on the sides.
Figure 8, Sound Directionality
Sound Pressure Levels - Low Ambient Operation
Unit operation at a lower ambient temperature than 95°F will also result in lower sound pressure levels.
The sound pressure level will decrease 1 dBA for ambient temperatures between 85
°
F to 94°F (29.4
°
C
to 34.4
°
C), 2 dBA for ambient temperatures between 75
°
F to 84°F (23.9
°
C to 28.9
°
C), and 3 dBA for
ambient temperatures between 65
°
F to 74°F (18.3
°
C to 23.3
°
C).